package com.zlf.the.observer;

import java.util.ArrayList;
import java.util.List;

public class Subject {

		private List<Observer> observers = new ArrayList<Observer>();
		private int state;

		public int getState() {
				return state;
		}

		public void setState(int state) {
				this.state = state;
				notifyAllObservers();
		}

		public void attach(Observer observer){
				observers.add(observer);
		}

		public void notifyAllObservers(){
				for (Observer observer : observers) {
						observer.update();
				}
		}
}
